Two questions: polyester + polyurethane foam & any underwater use contact adhesives?

1. How well does polyester resin adhere to the 'skin' of poured polyurethane foam ? ( if at all ! )

2. Are there any contact adhesives that are usable for underwater use ?

 

1. It doesn't adhere very well, but you can use an intermediate layer of Sika-290 primer to improve adhesion.

2. There is liquid neoprene, used by Mercruiser to seal bellows to the alloy housing. It is also used to repair inflatables.

 

Thanks CDK, I've noted those suggestions.